Print Trapezium Number Pattern
In the previous article, we have discussed Java Program to Print Alphabet N Number Pattern
In this article we are going to see how to print trapezium number pattern.
Example-1 Rows : 3 1 2 3 4 10 11 12 13 5 6 7 9 10 11 8 9 9 10
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Approach:
- Enter total number of rows and store it in an integer variable
rows - Take tone outer for loop to iterate the rows.
- Take three inner for loops, one to print space and other to print left and right sides.
- After each iteration print a new line.
Java Code to Print Trapezium Number Pattern
import java.util.Scanner;
class Main
{
public static void main(String[] args)
{
//Create a new Scanner object
Scanner scan = new Scanner(System.in);
//Taking total number of rows as input from user
System.out.print("Rows : ");
int rows= scan.nextInt();
//Row and column are the iterators and counter to print
int numberOfRows, numberOfColumns;
//Variables to store print numbers
//Left is the left side and right is the right side of the pattern
int left = 1, right = rows * rows + 1;
for (numberOfRows = rows; numberOfRows > 0; numberOfRows--)
{
//Loop to print space
for (numberOfColumns = rows; numberOfColumns > numberOfRows; numberOfColumns--)
{
System.out.print(" ");
}
//Loop to print left side
for (numberOfColumns = 0; numberOfColumns <= numberOfRows; numberOfColumns++)
{
System.out.print(left++ + " ");
}
//Loop that prints rightside
for (numberOfColumns = 0; numberOfColumns <= numberOfRows; numberOfColumns++)
{
System.out.print(right++ + " ");
}
//Setting the right variable after each iteration
right = right - (numberOfRows - 1) * 2 - 1;
// Prints a new line
System.out.println();
}
}
}
Output: Rows : 3 1 2 3 4 10 11 12 13 5 6 7 9 10 11 8 9 9 10
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